Hello Ross,
The only way this will work is to set
public class TestObject
{
public int Key { get; set; }
public decimal Amount { get; set; }
}
The amount like this. Which will prevent it to be null and this way when you delete the value in the column it will not throw an exception and the value shown in the grid will be 0.
I hope this helps.
Sincerely,
Georgi Sashev
Developer Support Engineer
Infragistics, Inc.
http://ko.infragistics.com/support